Filter-Based VLANs JN0-650 Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   What does the 'show ethernet-switching table' command reveal about filter-based VLAN operation?

   • AIt shows the MAC addresses that have been learned in each VLAN, including those assigned by filter-based VLANs
   • BIt shows the VLAN assignment of each interface
   • CIt shows the firewall filter configuration
   • DIt shows the number of packets that matched each filter term
   Reveal Solution Discussion Select an answer first
2. 12foundation · easy

   What is the primary purpose of a filter-based VLAN in Junos?

   • ATo provide a dedicated routing instance for each VLAN
   • BTo filter broadcast traffic within a VLAN
   • CTo replace the need for spanning-tree protocol on a VLAN
   • DTo assign packets to a VLAN based on the contents of a firewall filter match criteria
   Reveal Solution Discussion Select an answer first
4. 13expert · hard

   A network engineer is troubleshooting a filter-based VLAN configuration on a Junos switch. The filter is intended to place traffic from a specific server (MAC 00:11:22:33:44:55) into VLAN 100. The filter is applied to the correct interface in the input direction. However, the server's traffic is being placed into the default VLAN (VLAN 1). The engineer has confirmed the filter is committed and the match condition is correct. What is the most likely reason the filter is not matching?

   • AThe filter is applied to the wrong interface, even though it appears to be correct in the configuration.
   • BThe filter is missing the 'then accept' action, which is required for the 'vlan-id' action to take effect.
   • CThe interface is configured as a trunk port, which prevents filter-based VLANs from working.
   • DThe server is sending traffic with a VLAN tag, and the filter is matching on the untagged frame.
   Reveal Solution Discussion Select an answer first
5. 14foundation · easy

   In which direction should a filter-based VLAN firewall filter be applied on an interface?

   • ABoth input and output
   • BOutput
   • CInput
   • DNeither; it is applied globally
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6. 15expert · hard

   A network engineer is troubleshooting a filter-based VLAN on a Junos switch. The filter is designed to place traffic from a specific MAC address into VLAN 100. The filter is applied to the correct interface in the input direction. The engineer has verified that the filter is committed and that the MAC address is correct. However, the traffic is still being placed in the default VLAN. The engineer checks the 'show firewall filter' output and sees that the match counter for the filter is not incrementing. What is the most likely cause of this issue?

   • AThe filter is not being evaluated because the interface is not a member of any VLAN.
   • BThe traffic is arriving with a VLAN tag, and the filter is matching on the untagged frame.
   • CThe filter is being applied to the wrong interface, even though it appears correct in the configuration.
   • DThe filter is missing the 'then accept' action, which is required for the 'vlan-id' action to take effect.
   Reveal Solution Discussion Select an answer first